Yealink phones through 2019-08-04 have an issue with OpenVPN file upload. They execute tar as root to extract files, but do not validate the extraction directory. Creating a tar file with ../../../../ allows replacement of almost any file on a phone. This leads to password replacement and arbitrary code execution as root.

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Advisories
Source ID Title
EUVD EUVD EUVD-2019-5817 Yealink phones through 2019-08-04 have an issue with OpenVPN file upload. They execute tar as root to extract files, but do not validate the extraction directory. Creating a tar file with ../../../../ allows replacement of almost any file on a phone. This leads to password replacement and arbitrary code execution as root.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T00:19:41.434Z

Reserved: 2019-08-04T00:00:00.000Z

Link: CVE-2019-14657

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-10-08T13:15:15.317

Modified: 2024-11-21T04:27:05.370

Link: CVE-2019-14657

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses